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3 years ago

The ratio of the area of a circle to the circumference of the circle (

%20" id="TexFormula1" title=" \frac{A}{C} " alt=" \frac{A}{C} " align="absmiddle" class="latex-formula">) is $\frac{7}{1}$ . Find the circumference of the circle. Leave your answer in terms of pi.

Mathematics

1 answer:

maxonik [38]3 years ago

8 0

$\dfrac{\pi r^2}{2\pi r}=\dfrac{7}{1}\\
\dfrac{r}{2}=\dfrac{7}{1}\\
r=14\\\\
C=2\pi \cdot14=28\pi$

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